The only issue I had with the movie was Hans Zimmer's music being a little too loud and repetitive. It was actually overbearing. I liked the ending. The entire film is weaved into that ending so how can you say it was perfect until that point? Did you think aliens were orchestrating everything? If so, they would still need the same abilities to have sent the messages. I think the explanation of future generations of evolution manipulating time through extra dimensions may be possible. I am not a science buff (honestly on the ignorant side of a common man), but my brother is a scientist and my father is deep into both real and science fiction.They both liked it, too. I did not even like the Dark Knight movies. I thought Inception was okay, but I couldn't relate to it that much because I don't have lucid dreams. I liked Interstellar. This is my favorite Nolan movie that I have seen. The only question I would have is how it started? If he seeded the future for human evolution and then they sent him back it creates a loop that you just sort of have to accept just started from nothing. It did not ruin the ending for me though.